title: Pneumocystis carinii pneumonia as presenting feature of lymphoma.
mesh_terms: D001707:Biopsy, Needle; D006801:Humans; D008223:Lymphoma / Q000150:complications* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011020:Pneumonia, Pneumocystis / Q000209:etiology* / Q000473:pathology